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ko o t e n aY Bo u n d a rY re g I o n Su M M a r Y The Kootenay-Boundary portion of the surveys required 19 separate days and 100.5 hours between July 26 th and August 20 th . Weather conditions and visibility were generally good. Surveys covered the entire landbase of the Arrow, Boundary, Kootenay Lake, Cranbrook, Invermere, Revelstoke, and Columbia Timber Supply Areas. The surveyors were Neil Emery and Adam O’Grady of Nazca Consulting Ltd., using a Cessna 337 Skymaster operated by Babin Air. ar r o w tSa Bark Beetles Mountain pine beetle populations continued to decline. Total area affected was down by 60% to 2,260 hectares, and the number of spot infestations was down by nearly 70%, to just 260. Most of the red attack was seen in the southern portions of the TSA, in and around Lost Creek, Trail, and Monashee Pass, with a few smaller scattered pockets of red attack along Lower Arrow Lake. Douglas-fir beetle has increased slightly in the Pend D’Oreille River and Whiskey Point areas, although overall area affected is still relatively low at 160 hectares. Another 22 small spot infestations killed an additional 300 trees. Western balsam bark beetle activity remained quite scattered in small pockets. Affected area totalled 1,765 hectares, most of which was classified as trace. Defoliators Aspen serpentine leaf miner activity increased substantially from 343 hectares in 2011, to 4,970 hectares in 2012. Most defoliation was across the eastern and southeastern portions of the TSA, near Slocan Lake, Ymir, and Monashee Pass. Most of the defoliation was rated as light or moderate. Birch leaf miner activity was minimal, and was recorded on only 110 hectares. Foliar Diseases A second consecutive cool, wet spring and early summer led to higher infection rates of larch needle blight and as a result the mapped area expanded from 5,580 hectares in 2011, to 9,060 hectares in 2012. Affected stands were most prevalent in the Salmo, Rossland, and Slocan Valley areas. Most of the damage was light or moderate, and no tree mortality is expected. Other damaging agents mapped during the aerial surveys were 22 hectares of bear damage in lodgepole pine plantations near Salmo, 48 hectares of wildfire, and 36 new or expanded avalanche tracks in the Bremner Creek, St. Leon Creek, and Halfway River areas. Ministry of Forests, Lands and Natural Resource Operations, Kamloops, B.C. 28
Bo u n d a rY tSa Bark Beetles Mountain pine beetle populations have continued to expand in the TSA, with total affected area up by over 40% to 13,932 hectares. Most of the mortality is still classified as trace or light and the number of small spot infestations has increased to 486, which reflects a highly scattered but viable beetle population. Most of the increased red attack was seen in the Lynch Creek, Grand Forks, and upper Granby River areas. Small patches of red attack were mapped across most other areas of the TSA, including the Kettle River, Beaverdell, Trapping Creek, Conkle Lake, lower Granby River, and Christina Lake areas. Other bark beetles had less impact, with trace levels of western balsam bark beetle being mapped on 590 hectares; Douglas-fir beetle was detected in only a few small, scattered pockets. Defoliators Populations of western spruce budworm remained high in 2012, with just over 43,000 hectares of defoliation. Over half of the area was moderately or severely defoliated, with the area of severe defoliation increasing over five-fold to 7,730 hectares. The heaviest defoliation was concentrated around the Bridesville - Rock Creek area. Damage was seen as far east as Christina Lake, in stands with no previous record of defoliation. Three-tree beatings performed at nine permanent sample plots collected an average of 35 larvae per site. A total of 13,678 hectares of high-value Douglas-fir forests were treated with Foray 48B (B.t.k.) between June 30 th and July 5 th . Treatment was effective, as only 8% of sites sampled for eggmasses in the fall predicted moderate or severe defoliation in 2013. The Douglas-fir tussock moth outbreak has subsided. No defoliation was visible, and moth catch at nine permanent sampling sites in the TSA was low, with only four sites having positive catches. Three sites averaged less than two moths per trap, and one site at Kettle Provincial Park averaged 6.5 moths per trap. Three-tree beatings were conducted at all sites, but no Douglas-fir tussock moth larvae were found. Aspen serpentine leaf miner damage was minor, with just 278 hectares visibly affected. Foliar Diseases Area affected by larch needle blight decreased, from 14,040 hectares in 2011 to 4,040 hectares in 2012. However, many stands have been affected for two consecutive years and the impacts may be significant. Damage was scattered throughout the District. Other damage detected during the aerial surveys were small areas affected by bear damage, wildfire, and windthrow. Ministry of Forests, Lands and Natural Resource Operations, Kamloops, B.C. 29 Mountain pine beetle attack in the West Kettle River valley, Boundary TSA.
Page 1 and 2: 2012 Overview of Forest Health Cond
Page 3 and 4: In t r o d u c t I o n This report
Page 5 and 6: Table 2 continued. Area summaries f
Page 7 and 8: So u t h e r n In t e r I o r ov e
Page 9 and 10: Attack in young lodgepole pine stan
Page 11 and 12: A total of 116,012 hectares of high
Page 13 and 14: we S t e r n he M l o c k lo o P e
Page 15 and 16: BI r c h le a f MI n e r, fe n u s
Page 17 and 18: th o M P S o n ok a n a g a n re g
Page 19 and 20: Aspen decline syndrome became more
Page 21 and 22: Defoliators Western spruce budworm
Page 23 and 24: Defoliators Western spruce budworm
Page 25 and 26: Conifer Defoliators Western spruce
Page 27: A Douglas-fir Drought-Decline Compl
Page 31 and 32: cr a n B r o o k tSa Bark Beetles M
Page 33 and 34: go l d e n tSa Bark Beetles Mountai
Page 35 and 36: ca r I B o o re g I o n Su M M a r
Page 37 and 38: Douglas-fir beetle continued to be
Page 39 and 40: Defoliators As expected, western sp
Page 41 and 42: Thompson Okanagan Region The Thomps
Page 43 and 44: Table 2. List of western spruce bud
Page 45 and 46: Hiller spraying B.t.k. on budworm b
Page 47 and 48: Kootenay Boundary Region A total of
Page 49 and 50: Abbott’s corrected mortality comp
Page 51 and 52: Figure 5. Density and distribution
Page 53 and 54: 2012 Population Monitoring - Result
Page 55 and 56: Above: Lucy Stad receiving budworm
Page 57 and 58: One of the cancelled spray areas in
Page 59 and 60: In the Thompson-Okanagan Region, we
Page 61 and 62: Figure 9. Average number of western
Page 63 and 64: There is an ongoing study to calibr
Page 65 and 66: Larval density ± SEa b Percent mor
Page 67 and 68: Table 19. Total number of larvae pe
Page 69 and 70: Table 21. Average number of Douglas
Page 71 and 72: This stand has records of defoliati
Page 73 and 74: References Garbutt, R. 1992. Wester
Page 75 and 76: Be a r IM Pa c t S o n gr o w t h o
Page 77 and 78: To better understand the progressio

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